120mm f/5, 100x, Bortle 3, SQM-L 21.3
I only classified this group as moderately difficult, because I could see a diffuse, roundish brightening near faint field stars with averted vision without any problems. I'm pretty sure, that this is NGC68 as brightest member of the group.

MODERATE

8" f/6, 171x, Bortle 3, NELM 6.4
Overall difficult group with 8 inch, which is embedded between faint field stars. NGC68 (brightest western) is brightest member and appeared at 171x roundish with slightly brighter center, held with averted vision. NGC71 (southeastern of NGC68) was glimpsed as roundish, diffuse brightening. NGC70 (northeastern of NGC68) I tried without any success.

4.5" f/8, 28x, Bortle 3, NELM 6.4
Very bright, round core, surrounded by a likewise bright, oval halo. The fainter outer regions can followed over 2°, if the conditions are good. With averted vision west of the core 2 dust lanes are prominent, nearly parallel and slightly curved.

NGC13 (GLX)

8" f/6, 210x, Bortle 4
The fairly bright core is most obvious. Galaxy appears most of the time as round to slightly oval brightening. Very faint outer extension rarely seen, when the galaxy appears more elongated.

120mm f/5, 18x, Bortle 4, SQM-L 21.1
At 18x rather faint, very elongated with tapering ends. At 40x similar view but overall more obvious. The dust lane was not visible.

MODERATE

120mm f/5, 18x, Bortle 3, SQM-L 21.3
At 18x more or less obvious with averted vision, elongated, evenly bright. At 75x the dust lane is perceptible to some extent with averted vision, but not clearly & permanently visible.

8" f/6, 100x, Bortle 4, NELM 6.0+, SQM-L 21.1
One of the most beautiful edge-on galaxies of the autumn sky! Already seen at 37x as faint, very elongated and thin nebula with averted vision. Can easily been overlooked. Broadening and slight brightening toward the middle. At 100x dust lane obvious with averted vision, which is slightly shifted to SE. The surrounding area of NGC891 offers many more interesting galaxies, particularly the galaxy cluster Abell347!

UGC1840 (GLX)

Arp145 actually consists of two galaxies: The brighter PGC9062 (=UGC1840) and the much fainter PGC9060 (v17.8m), which is located in the southwestern part of the "donut".

8" f/6, 200x, Bortle 4
Small, round, slightly darkening toward the edge. Faint star pair nearby. The "donut" (that's no image artifact!) needs more aperture for sure.Hint: Galaxy located less than 5' from a bright 5.8m star. I recommend an eyepiece with narrow field of view and less internal reflections! A 6mm ortho worked fine for me :-)